Fix context menu on non-focused window #5802

Job	Run time
cargo fmt	1m 23s
cargo clippy+test (wayland)	1m 24s
druid doctests	37s
Docs (windows-latest)	44s
mdbook build	23s
Docs (macos-latest)	45s
cargo clippy+test (windows-latest)	2m 30s
Docs (ubuntu-latest)	48s
cargo clippy+test (macos-latest)	1m 28s
cargo clippy+test (gtk)	1m 7s
cargo clippy+test (ubuntu-latest)	1m 41s
cargo test (wasm32)	1m 19s
	14m 9s

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